JPH05204020A - Film unit with lens - Google Patents

Abstract

PURPOSE:To easily recognize a real picture which is actually projected by peeping through a finder by specifying the coefficient of the visual field of the finder and making the visual field other than a range corresponding to the real picture colored or semi-transparent including a mesh-like stripe. CONSTITUTION:The finder constitutes an inverse Galileo finder by combining a concave objective lens 21 and a convex eyepiece 23 and it is provided with the whole visual field having the coefficient of the visual field of at least 100%, preferablly, 120-130% with respect to the real picture of a screen frame projected by a photographing lens. Then, the visual field part of a peripheral part except the visual field corresponding to the real picture at a central part in the whole visual field is covered with a frame-like visual field frame sheet colored with green, blue, yellow, gray or the like and divided from the visual field corresponding to the real picture. In such a case, as for the installing position of the transparent sheet, it is fitted by being stuck on the front surface of the lens 21 like the transparent sheet SA or being stuck on the back surface of the lens 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film unit with a lens, which has exposure and winding functions and is capable of immediately taking a photograph on an unexposed film loaded in advance.

[0002]

2. Description of the Related Art A film unit with a lens is a so-called film-integrated camera having a function of taking a picture, which is also called a "shooting-only camera". Since it is used only for shooting a film, and the camera body is generally discarded after taking out the exposed film, it is manufactured at a low cost with a simple structure.

In addition, although cameras are often purchased and used on the go while traveling, it is hard to say that they are convenient to carry, and they are equipped with a taking lens of f = 35 mm and have an outer shape of 110 mm × 60 m.
It was about m × 35 mm, and I couldn't fit the chest of my shirt, which was inconvenient.

[0004]

However, although it is said to be a "camera that is completely shot", the camera function has been enhanced as in the case of a lens-equipped film unit with a built-in stroboscopic light emitting device, due to the recent diversification of shooting purposes. There is a tendency for that reason, and the increase in cost and the increase in camera size are inevitable.

Further, since the camera has a simple structure, the viewfinder has a general field of view without using a large number of lenses even if a plain viewfinder or lenses are used.
Most of them are 60-80%, and there are many cases in which it is difficult to see the finished photos with the surroundings unexpectedly. In addition, as compared with a general camera that can display only the part that can be seen in the viewfinder, it was uncertain what to expect in a low-cost viewfinder.

This field of view is 100% when the entire range that can be seen through the finder is not missing and is projected on the film without any excess, and the screen projected on the film is called the real screen.

As a result of solving and improving the above points, the present invention suppresses an increase in cost and an increase in size of the camera by simplifying the mechanism of the camera and utilizing the space, and is a small and inexpensive film unit with a lens. However, the actual screen that is actually projected through the viewfinder can be easily recognized.

[0008]

SUMMARY OF THE INVENTION The above-mentioned object is, in a lens-equipped film unit preloaded with an unexposed film, which enables photography by means of a built-in exposure and film feeding means, to improve the field of view of a finder provided in the unit. This is achieved by a lens-equipped film unit, which is 100% or more of the actual screen and is a semi-transparent sheet with a colored or mesh stripe outside the range corresponding to the actual screen.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an external view of a film unit with a lens of the present invention (hereinafter also referred to as a camera, which means a state in which no film is built in).
It is provided with mm film (J135) loaded, and at the end of shooting, the film is sent to the maker side without being rewound and it is taken out from the camera, developed and printed. Is done.

The unexposed film used in this camera is loaded with a cartridge in place, and after the camera is kept in a light-tight state, the winding shaft of the winding shaft on the film winding chamber side is driven. All the film in the cartridge is wound up in the film winding room. The user winds the film every time the photograph is taken, so that the photographed film is wound in the patrone. Therefore, on the maker side, the film that has already been taken can be taken out from the camera as a patrone in a bright room.

It is possible to easily take out the cartridge containing the photographed film by bending a part of the back cover. Therefore, the camera part is checked, a new unexposed film is loaded, and the back cover is loaded. It can be reused by replacing.

As the cartridge loaded in the camera, a cartridge having an outer diameter of 18 to 20 mm (20.6 mm in this embodiment) having a smaller outer diameter than that of a commonly used cartridge (K7528) is used.

As a result, the thickness of the camera can be suppressed to around 24 mm except for the lens barrel portion having the taking lens, and an ultra-thin and compact film unit with a lens is realized by inserting a film. ..

The camera is provided with a cardboard carton (paper cover) on the outer surface of which a product name, a simple method of use, etc. are displayed.

FIG. 2 is a development view showing the structure of the present camera.

Reference numerals 10, 20 and 30 denote a camera body, a front cover and a back lid, which are main components of the camera, respectively, and 40 denotes a built-in strobe unit, and 50,
Reference numerals 60 and 70 are film winding, sector charge and film counter mechanisms, respectively.

When the camera body 10 is used alone, each member constituting the film winding mechanism 50, the sector charge mechanism 60, and the film counter mechanism 70 is mounted, and the shutter case 11 for housing the sector is mounted.

The shutter case 11 is fixed by engaging claws 11A projecting on both sides with a locking portion 10A on the front surface of the camera body 10, and links the sector to the sector charge mechanism 60.

Further, on the front surface of the shutter case 11, a photographing lens 12 having a focal length of f = 30 mm and a diaphragm of F9.5 is dropped, and a slit 13A for engaging with a guide pin 11B is provided. Covered by lens retainer 13.

The camera body 10 and the shutter case 11 described above
Are molded from a black matte plastic material having some elasticity, including the front cover 20 and the back cover 30 described above.

On the other hand, the strobe unit 40 is mounted and supported with reference to holes 40A and 40B on the substrate which engage with the guide pins 10B and 10C on the front surface of the camera body 10, respectively.

In the strobe unit 40, the upper and lower battery contact pieces 41 integrated with each other are inserted into the upper and lower slit holes 10D of the camera body 10 and projected into the battery chamber on the rear surface of the camera body 10 to form an AA battery as a strobe charging power source. Hold a certain power supply battery E.

The integrated main capacitor C is stored in a capacitor chamber formed under the shutter case 11.

The above-mentioned lens retainer 13 and strobe unit 40
The fixing and integration of the above with the camera body 10 is completed by mounting the front cover 20 on the camera body 10.

Prior to mounting the front cover 20 on the camera body 10, an objective lens 21 of a finder is dropped in front of the front cover 20 and is fixed by engaging a decorative cover 22. The front makeup cover 22 has a guide pin 22A and four nails 22B on the back.
Are provided so as to be engaged with the holes 20A on the front surface of the front cover 20 and the locking portions 20B at four positions, and are attached.

The front cover 20 is further mounted on the front surface of the camera body 10 after the eyepiece lens 23 of the finder is engaged and mounted on the rear surface.

The front front cover 20 has a hole 20C, a claw 20D, and three engaging portions 20E on the rear surface, and each of them is used as a guide pin 10E, a nail 10F and a side engaging portion 10G on the front of the camera body 10. It is fitted and attached.

By mounting the front cover 20 on the camera body 10, the lens retainer 13 and the strobe unit 40 are fixed to the camera body 10.

The camera body 10 with the front cover 20 attached
In the cartridge chamber 15A and the scroll chamber (film winding chamber) 15B formed on the back side of the cartridge, a cartridge P1 containing an unexposed film and a spool S2 having the leading end of the unexposed film F locked therein are loaded.

The other end of the film F is locked to the spool S1 in the cartridge P1. Even if the film in the cartridge is wound up by the spool S2 after the film is loaded, the other end is locked to the spool S1. Therefore, it can be rolled up in the Patrone P1 every time the shooting is completed.

A back cover 30 is attached to the back surface of the camera body 10 in which the film F is loaded so that the film F is protected from light and the focus surface position is restricted.

The back cover 30 is provided with claws 30A and 30B on the front surface thereof and locking holes 30C and 30D on the side surfaces thereof.
Claws 30A and 30B are engaged with the camera body 10 when mounted on the camera.
On the 10H and 10J, the one holes 30C and 30D are the nails 10 of the camera body 10.
It is fixed by engaging K and 10L.

Next, details of the film winding mechanism 50, the sector charge mechanism 60, and the film counter mechanism 70 will be described.

FIGS. 3 and 4 show the above-mentioned respective mechanical parts at an angle when viewed from the rear side of the camera.

The camera body 10 is provided with a cartridge chamber 15A and a scroll chamber 15B in the same plane on both sides of the screen frame 16 which is the exposure section, and is a film container shown in FIG. J caught in P1
The 135 film F is loaded.

The film F used in this camera of the present embodiment is a J135 film which is usually used or a slightly thin thickness of 120 to 140 μm, which is about 2 times as much as a general camera.
Roll film J1 used for Patrone in 5mm
With 35, it is preferable to reduce the number of frames taken. In the manufacturing process, the cartridge is used as a storage container in advance in a dark room or the like, and the end thereof is fixed to the spool S1 of the cartridge P1 so that a predetermined number of frames can be photographed and the film is drawn from the film outlet of the cartridge P1 to a predetermined length. The film has come out. The film in this state will be loaded into the camera. The loading method will be described below.

The cartridge P1 is loaded in the cartridge chamber 15A so that the spool S1 of the cartridge P1 is engaged with the fork 52 of the hoisting fork 52. On the other hand, the spool S2 is also inserted in the scroll chamber 15B. Then, in the present embodiment, the film F is pulled out until the tip of the film notch FN, which is provided with a film management code and is provided in the vicinity of the tip side of the film F, is aligned with the index 17A below the lower rail surface.
The tip of the film F is inserted into the slit SL of the spool S2 to lock the perforation P of the film F to the claw H. The spool S2 may be mounted in the scroll chamber 15B after the front end of the film is locked to the spool S2. In addition,
The film notch FN is such that the emulsion lot number of the film is indicated by several holes provided in the tongue portion at the tip of the film. Instead of the notch serving as a mark, another mark may be appropriately provided on the film.

Next, the back cover 30 is covered and the cover is made light-tight.
Then, the main camera in this state is attached to the film winding device, and the film F is completely wound on the spool S2 of the scroll chamber 15B (however, the other end is within a range where it does not separate from the spool S1 of the cartridge P1) and the film loading is completed. It will be. By aligning the notch with the index on the camera side, the trailing edge of the film is prevented from coming off the spool S1 in the cartridge. When the film F is completely loaded in this manner, the film F enters a shooting standby state and is sequentially wound into the patrone P1 for each shooting, and in this embodiment, after the shooting of a predetermined number of frames is completed, the film F is predetermined. When two frames of the blank feed are carried out, the film already taken is caught in the cartridge P1 and
The leading end portion of the film F is left in the required length without being caught in the cartridge. Therefore, this cartridge can be taken out from this camera in a bright room.
It is possible to leave so-called Bello.

Next, the mechanism of the main body will be described.

In the camera body 10, a film winding mechanism 50 including a photographing lens 12, a sector charge mechanism 60,
The main mechanism of the film counter mechanism 70 is incorporated therein.

First, the film winding mechanism and the sector charge mechanism will be described.

Reference numeral 51 denotes a film winding knob, and the film F loaded as described above is wound up by rotating the film winding knob 51 counterclockwise. A cam 55 coaxial with an eight-toothed sprocket gear 54 meshing with the perforation P of the film F and having a fan-shaped cam portion 55B at the bottom.
Is designed to rotate exactly once counterclockwise by winding the film.

That is, the film is wound up with one per piece having a length of eight perforations, which is the number of teeth of the sprocket gear, and the piece size is a so-called full size piece size of 24 × 36 mm.

By the counterclockwise rotation of the cam 55, the fan-shaped cam portion 55B naturally rotates counterclockwise as described above, and in the process, the fan-shaped cam portion 55B causes the charge lever to rotate.
61 is rotated clockwise against the spring force of the charge lever spring 64 that biases the charge lever shaft 63 in the counterclockwise direction about the rotation axis, and the triangular ketobashi 61C provided on the charge lever 61 causes the sector to rotate. The rising portion 65B of the lever 65 is pressed, and then the rising portion 65B is overcome to charge the sector charge mechanism as shown in the figure.

The pin 65C of the sector lever 65 and the camera body 10
A sector spring 67 is stretched between the pins 18C provided at the sector lever 67, and the tensile force of the sector spring 67 causes the sector lever 65 to move.
The left end of the elongated hole is brought into contact with a pin 18B provided on the camera body 10 that guides the elongated hole of the camera in a slidable and rotatable manner, and the sector lever
Pin 18 provided on camera body 10 with arm plate 65D provided on 65
It comes in contact with E. Further, a sector drive pin 65A for actuating the sector 66 pivotally supported by the sector pin 18D provided on the camera body 10 is inserted in the forked portion of the sector 66.

As will be described later, the cam stopper after shooting is completed.
The projecting portion 62D of 62 is removed from the groove portion 55A of the cam 55,
The arm portion 57A of the hoisting stopper 57 changes from the state shown in the drawing to change the arm portion 61A of the charge lever 61 and the arm portion of the cam stopper 62.
The arm 62A is in contact with the end surface of the arm portion 61A by the spring force of the hoisting stopper spring 58 which is displaced from each edge of the arm 62A and urges clockwise. When the cam 55 rotates exactly once as described above by the film winding and the groove 55A of the cam 55 returns to the initial position, the spring force that biases the cam stopper 62 in the clockwise direction by the horizontal end portion of the charge lever spring 64. As a result, the protrusion 62D of the cam stopper 62 jumps into the groove 55A. By this jumping operation, the lock of the arm portion 57A of the hoisting stopper 57, which was locked at the end surface of the arm portion 62A of the cam stopper 62 at this time, is released.

The outer peripheral cylindrical surface of the film winding knob 51 is a ratchet gear, and the V-shaped projection at the tip of the winding stopper 57 is released by the release of the lock, and the ratchet force of the winding stopper spring 58 causes the ratchet to rotate. It jumps into the tooth groove of the gear 51A and prevents the film winding knob 51 from rotating in the counterclockwise direction. That is, when the film winding is completed, the film winding knob 51 is prevented from further winding rotation.

Further, in the camera body 10, the tip of the reverse rotation preventing claw 53 utilizing the elasticity of the resin material is pressed against the ratchet gear 51A so as to prevent the film winding knob 51 from rotating in the opposite winding direction. It has become.

By pressing the release button 25 of the front cover 20, the release button pin 25A is planted on the back surface of the release button 25.
Operates in the direction of arrow A. That is, the front cover 20
When attached to the camera body 10, the winding knob
51 By the operation of the tip of the release button pin 25A in the direction of arrow A described above, the hoisting stopper 57 rotates counterclockwise against the spring force of the hoisting stopper spring 58. Then, from the end surface of the arm portion 57A of the hoisting stopper 57, the arm portion of the charge lever 61
The edge of 61A is disengaged, and the charge lever 61, and thus the cam stopper 62, is rotated counterclockwise by the spring force of the charge lever spring 64.

The charge lever 61, which is stronger than the sector spring 67, rotates counterclockwise by the spring force of the charge lever spring 64.
C hits the rising portion 65B of the sector lever 65 and then comes off the rising portion 65B. Therefore, the sector lever 65 rotates clockwise around the pin 18B in the long groove of the sector lever against the tensile force of the sector spring 67, and the sector spring 67
It returns to its original state due to the pulling force of. Therefore, sector drive pin 65A
Will rotate sector 66 about sector pin 18D to expose the film and then close it.

On the other hand, the cam stopper 62 also rotates counterclockwise together with the charge lever 61 as described above,
The protruding portion 62D of 62 is removed from the groove portion 55A of the cam 55. Therefore, even if you stop pressing the release button, the winding stopper
The arm portion 57A of 57 is biased in the clockwise direction by the spring force of the hoisting stopper spring 58, but the arm portion 61A of the charge lever 61.
Is stopped by the end face of the
The shaped protrusion does not lock the ratchet gear 51A of the winding knob 51. Therefore, the next film winding can be performed.

Next, the film counter mechanism will be described.

As described above, 72 meshes with the V groove 56A provided at the upper end of the cam shaft 56 planted in the cam 55 which rotates integrally with the sprocket gear 54, and one frame of film is wound up to form a cam shaft. It is an exponential gear that rotates clockwise one tooth each time 56 rotates once.

An index plate 71 is printed on the upper surface of the index wheel gear 72 as an integrally molded product, and the number of remaining photographable films is displayed through the film counter window 26 on the upper surface of the front cover 20.

A projecting portion 72A is provided on the lower surface of the exponential gear 72, and the projecting portion 72A is projected by the next film winding after the photographing of a predetermined number of frames is completed.
It is designed to be inserted between the E and another protruding portion 62E of the cam stopper 62 so as to enter. Then, the projecting portion 72A is replaced by the two projecting portions 61.
By entering between E and 62E, the film is wound up by one frame, and even if the cam 55 makes one rotation and the charging of the sector is completed, both the projecting portions 61E and 62E become the projecting portion 72A of the exponential gear 72. As the movement is blocked, the charge lever 61 cannot operate and the protruding portion 62D of the cam stopper 62 is also in the groove portion of the cam 55.
You will not be able to jump into 55A. The arm portion 57A of the hoisting stopper 57 contacts the end face of the arm portion 62A of the cam stopper 62 by the spring force of the hoisting stopper spring 58, and the V-shaped projection at the tip of the hoisting stopper 57 locks the ratchet gear 51A. Also, it is not possible to operate the charge lever 61 to open and close the sector to expose the film.

In this way, in the present embodiment, when two frames of film are fed in an idle manner, the index plate gear 72 rotates by two teeth. This rotation causes the protrusion 72 of the index plate gear 72 to rotate.
A is a charge lever that holds down the protrusion 61E at all.
The movement of 61 is blocked, but another protrusion 62 of the cam stopper 62 is
It is designed to come off from E. Therefore, the protrusion 62D
Jumps into the groove 55A of the cam 55, the winding stopper 57 is disengaged, and the winding stopper 57 locks the winding knob 51, so that the film cannot be wound. Further, as described above, the movement of the charge lever 61 is blocked so that the film cannot be exposed. In this way, the tongue at the leading end of the film is prevented from being caught in the cartridge and the tongue of the required length is secured. Therefore, in order to make the camera compact, even if a cartridge having a small outer diameter is used, there is no problem in pulling out the film from the cartridge at the time of development.

FIG. 5 shows the construction of the finder optical system provided in the present camera. The finder constitutes an inverse Galilean finder by combining the concave objective lens 21 and the convex eyepiece 23. It has a total field of view of at least 100%, preferably 120 to 130%, relative to the screen.

Of the entire visual field, the peripheral visual field portion except the visual field corresponding to the central real screen is covered with a frame-shaped visual field frame sheet S colored in green, blue, yellow or gray. Are separated from the visual field corresponding to the actual screen.

The installation position of the transparent sheet S is shown in FIG.
The transparent sheet SA shown in (a) is attached to the front surface of the objective lens 21, or the transparent sheet SB shown in FIG. 5 (b) is attached to the rear surface of the objective lens 21. Further, as shown in FIG. 5C, they may be independently installed at an intermediate position between the objective lens 21 and the eyepiece lens 23.

The transparent sheet S is not only colored but also
It is also possible to use a translucent sheet that has been processed into a mesh shape, and the objective lens 21 may be used instead of the transparent sheet S.
It is also possible to take a means of applying a paint directly to the above to make it translucent in a frame shape.

FIG. 6 shows a concrete example of the finder field of view in which the transparent sheet S is installed, and the field of view A of the copy body and the field of view B of the background surrounding it are simultaneously and clearly distinguished at the time of photographing. Since it can be visually recognized, it is extremely easy to set the composition.

In the present embodiment, the finder having an optical system has been described, but the transparent sheet S can be applied to a so-called frame finder which does not use an optical system, for example, a transparent finder. The same effect can be obtained by installing a colored sheet on the outer edge portion of the sheet or a colored frame sheet formed corresponding to only the outer edge portion in the finder space.

[0063]

According to the present invention, from the standpoint of the user,
An extremely useful lens-equipped film that makes it easy to determine the composition and is easy to use, even for unskilled beginners, and allows the manufacturer to freely select the viewfinder field according to the screen of the shooting lens to be attached. Units will be provided. When a finder lens is used, the light is reduced in the peripheral portion of the finder lens, so that it is possible to prevent the rear end of the lens from being difficult to see due to reflected light from the viewing side.

[Brief description of drawings]

FIG. 1 is an external perspective view of a film unit with a lens of the present invention.

FIG. 2 is an exploded perspective view showing a configuration of the unit.

FIG. 3 is a developed perspective view showing a film winding mechanism and the like of the unit.

FIG. 4 is a perspective view of a film loaded in the unit.

FIG. 5 is a configuration diagram of a finder included in the unit.

FIG. 6 is an explanatory diagram of a field of view of the finder.

[Explanation of symbols]

 10 Camera body 12 Shooting lens 16 Screen frame 20 Front cover 21 Objective lens 22 Decorative cover 23 Eyepiece S, SA, SB, SC Transparent sheet A, B (finder) field of view

Claims (2)

[Claims] 1. In a film unit with a lens, which is loaded with an unexposed film in advance, which enables photography by means of a built-in exposure and film feeding means, the field of view of a finder included in the unit is 100% or more with respect to an actual screen. , A film unit with a lens, characterized in that the field of view outside the range corresponding to the real screen is colored or semi-transparent with mesh stripes. 2. A film unit with a lens, wherein the viewfinder optical system is provided with a visual field frame sheet which is transparent in the center and is coated in a color corresponding to a visual field outside the range corresponding to the actual screen in the previous period.